Pi that entered your wallet after passing KYC is in a locked-up state according to the settings you configured yourself.
I will tell you how to check this lock-up period.

① Open PiBrowser
② Open Wallet and enter your passphrase
③ Tap Pi Testnet at the top to switch to Pi Mainnet

When you tap Mainnet Transfer, the Pi you received will be displayed.
The lock-up period is displayed with a key icon.

It was a date several months before my KYC passing date. It is a mystery what triggers the start of the lock-up.